AUT 102 Week 1 Quiz

External combustion means that the fuel is being burned outside of the engine, while internal combustion means the fuel is burned inside of the engine.

• True

• False

The rate of air intake and exhaust of an engine when it is running is known as:

• compression

• volumetric efficiency

• horsepower

• vacuum

As ____ is a twisting or turning force, ____ is the rate (in time and distance) at which that force (_____) is produced.

• Torque; horsepower; torque

• Torque; horsepower; horsepower

• Horsepower; torque; horsepower

• Horsepower; torque; torque

The more power that can be produced, the more work can be performed in a given amount of time.

• True

• False

The bore is measured across the cylinder, parallel with the block deck, which is the machined surface of the block farthest from the crankshaft.

• True

• False

______ the diameter of the bore or ______ the length of the stroke will produce a larger piston displacement.

• Increasing; increasing

• Increasing; decreasing

• Decreasing; increasing

• Decreasing; decreasing

Compression loss results in low compression pressures and excessive amounts of blow-by gases into the crankcase, leading to ___________.

• Reduced combustion efficiency and less engine power

• Greater vehicle emissions

• Poor fuel economy

• All of the above

The air-fuel mixture is ignited and burns rapidly, at up to about ______.

• 3,000°F

• 3,500°F

• 4,000°F

• 4,500°F

The ratio of the crank gear to the camshaft gear(s) is:

• 2 to 1

• 1 to 2

• 4 to 1

• 3 to 1

Technician A says that an interference type engine has minimal clearance between the valves and the piston. Technician B says that in a noninterference engine, if the timing belt was to break, you could bend a valve. Who is correct?

• Tech A

• Tech B

• Both Tech A and B

• Neither Tech A or B